The Washington Post’s latest report on Trump’s mental health is not encouraging: Inside Trump’s fury: The president rages at leaks, setbacks and accusations.

Trump, meanwhile, has been feeling besieged, believing that his presidency is being tormented in ways known and unknown by a group of Obama-aligned critics, federal bureaucrats and intelligence figures — not to mention the media, which he has called “the enemy of the American people.”

That angst over what many in the White House call the “deep state” is fermenting daily, fueled by rumors and tidbits picked up by Trump allies within the intelligence community and by unconfirmed allegations that have been made by right-wing commentators. The “deep state” is a phrase popular on the right for describing entrenched networks hostile to Trump.

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The president has been seething as he watches round-the-clock cable news coverage. Trump recently vented to an associate that Carter Page, a onetime Trump campaign adviser, keeps appearing on television even though he and Trump have no significant relationship.

Stories from Breitbart News, the incendiary conservative website, have been circulated at the White House’s highest levels in recent days, including one story where talk-radio host Mark Levin accused the Obama administration of mounting a “silent coup,” according to several officials.

Stephen K. Bannon, the White House chief strategist who once ran Breitbart, has spoken with Trump at length about his view that the “deep state” is a direct threat to his presidency.